package cn.wangqi.personal.alipay.controller;

import cn.wangqi.personal.alipay.util.webconfig.AlipayConfig;
import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.internal.util.AlipaySignature;
import com.alipay.api.request.*;
import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 * Created by admin on 2017/8/10.
 */
@RequestMapping("alipay")
@Controller
public class AliPayController {
    private Logger logger = Logger.getLogger(AliPayController.class);

    /**
     * 支付宝支付订单
     *
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("pay.html")
    public String pay(HttpServletRequest request, HttpServletResponse response) {
        try {
            //获得初始化的AlipayClient
            AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key,
                    "json", AlipayConfig.charset, AlipayConfig.alipay_public_key,AlipayConfig.sign_type);
            //设置请求参数
            AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
            //手机网站参数
            // AlipayTradeWapPayRequest  alipayRequest = new AlipayTradeWapPayRequest ();
            alipayRequest.setReturnUrl(AlipayConfig.return_url);
            alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

            String bizContent = createPayInfo(request);
            alipayRequest.setBizContent(bizContent);
            String form = alipayClient.pageExecute(alipayRequest).getBody(); //调用SDK生成表单
            response.setContentType("text/html;charset=" + AlipayConfig.charset);
            response.getWriter().write(form);//直接将完整的表单html输出到页面
            response.getWriter().flush();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 支付宝查询订单
     *
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("query.html")
    public String query(HttpServletRequest request, HttpServletResponse response) {
        try {
            //获得初始化的AlipayClient
            AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json",AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
            //设置请求参数
            AlipayTradeQueryRequest alipayRequest = new AlipayTradeQueryRequest();
            String bizContent = createQueryInfo(request);
            alipayRequest.setBizContent(bizContent);
            //请求
            String form = alipayClient.execute(alipayRequest).getBody();
            response.setContentType("text/html;charset=" + AlipayConfig.charset);
            response.getWriter().write(form);//直接将完整的表单html输出到页面
            response.getWriter().flush();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 支付宝订单退款
     *
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("refund.html")
    public String refund(HttpServletRequest request, HttpServletResponse response) {
        try {
            //获得初始化的AlipayClient
            AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
            //设置请求参数
            AlipayTradeRefundRequest alipayRequest = new AlipayTradeRefundRequest();

            String bizContent = createRefundInfo(request);
            alipayRequest.setBizContent(bizContent);
            String result = alipayClient.execute(alipayRequest).getBody();
            response.setContentType("text/html;charset=" + AlipayConfig.charset);
            response.getWriter().write(result);//直接将完整的表单html输出到页面
            response.getWriter().flush();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 支付宝订单退款查询
     *
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("refundQuery.html")
    public String refundQuery(HttpServletRequest request, HttpServletResponse response) {
        try {
            //获得初始化的AlipayClient
            AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl,AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json",AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
            //设置请求参数
            AlipayTradeFastpayRefundQueryRequest alipayRequest = new AlipayTradeFastpayRefundQueryRequest();

            String bizContent = createRefundQueryInfo(request);
            alipayRequest.setBizContent(bizContent);
            String result = alipayClient.execute(alipayRequest).getBody();
            response.setContentType("text/html;charset=" + AlipayConfig.charset);
            response.getWriter().write(result);//直接将完整的表单html输出到页面
            response.getWriter().flush();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 支付宝订单退款
     *
     * @param request
     * @param response
     * @return
     */
    @RequestMapping("close.html")
    public String close(HttpServletRequest request, HttpServletResponse response) {
        try {
            //获得初始化的AlipayClient
            AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);
            //设置请求参数
            AlipayTradeCloseRequest alipayRequest = new AlipayTradeCloseRequest();

            String bizContent = createQueryInfo(request);
            alipayRequest.setBizContent(bizContent);
            String result = alipayClient.execute(alipayRequest).getBody();
            response.setContentType("text/html;charset=" + AlipayConfig.charset);
            response.getWriter().write(result);//直接将完整的表单html输出到页面
            response.getWriter().flush();
        } catch (AlipayApiException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    @RequestMapping("notify.html")
    public void notify(HttpServletRequest request) {
        logger.error("【执行回调】");
        StringBuilder sb = new StringBuilder();
        try {
            //获取支付宝POST过来反馈信息
            Map<String, String> params = new HashMap<String, String>();
            Map<String, String[]> requestParams = request.getParameterMap();
            sb.append("asyncNotice() PC支付 获取回调参数: ");
            for (Iterator<String> iter = requestParams.keySet().iterator(); iter.hasNext(); ) {
                String name = (String) iter.next();
                String[] values = (String[]) requestParams.get(name);
                String valueStr = "";
                for (int i = 0; i < values.length; i++) {
                    valueStr = (i == values.length - 1) ? valueStr + values[i]
                            : valueStr + values[i] + ",";
                }
                sb.append("subject:" + valueStr);
                try {
                    sb.append("subjectUrlD:" + URLDecoder.decode(valueStr, "utf-8"));
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
                //乱码解决，这段代码在出现乱码时使用
                //valueStr = new String(valueStr.getBytes("ISO-8859-1"), "utf-8");
                params.put(name, valueStr);
                sb.append(name);
                sb.append(":");
                sb.append(valueStr);
                sb.append("\n");
            }

            boolean signVerified = AlipaySignature.rsaCheckV1(params, AlipayConfig.alipay_public_key, AlipayConfig.charset, AlipayConfig.sign_type); //调用SDK验证签名

            //——请在这里编写您的程序（以下代码仅作参考）——

            /* 实际验证过程建议商户务必添加以下校验：
            1、需要验证该通知数据中的out_trade_no是否为商户系统中创建的订单号，
            2、判断total_amount是否确实为该订单的实际金额（即商户订单创建时的金额），
            3、校验通知中的seller_id（或者seller_email) 是否为out_trade_no这笔单据的对应的操作方（有的时候，一个商户可能有多个seller_id/seller_email）
            4、验证app_id是否为该商户本身。
            */
            if (signVerified) {//验证成功
                //商户订单号
                String out_trade_no = request.getParameter("out_trade_no");
                //支付宝交易号
                String trade_no = request.getParameter("trade_no");
                //交易状态
                String trade_status = request.getParameter("trade_status");

                if (trade_status.equals("TRADE_FINISHED")) {
                    //判断该笔订单是否在商户网站中已经做过处理
                    //如果没有做过处理，根据订单号（out_trade_no）在商户网站的订单系统中查到该笔订单的详细，并执行商户的业务程序
                    //如果有做过处理，不执行商户的业务程序

                    //注意：
                    //退款日期超过可退款期限后（如三个月可退款），支付宝系统发送该交易状态通知
                } else if (trade_status.equals("TRADE_SUCCESS")) {
                    //判断该笔订单是否在商户网站中已经做过处理
                    //如果没有做过处理，根据订单号（out_trade_no）在商户网站的订单系统中查到该笔订单的详细，并执行商户的业务程序
                    //如果有做过处理，不执行商户的业务程序

                    //注意：
                    //付款完成后，支付宝系统发送该交易状态通知
                } else {
                    logger.error("【执行 " + this.getClass().getName() + ".asyncNotice() 订单" + out_trade_no + " 支付失败】");
                }


            } else {//验证失败
                logger.error("【执行 " + this.getClass().getName() + ".asyncNotice() 订单支付失败】");

                //调试用，写文本函数记录程序运行情况是否正常
                //String sWord = AlipaySignature.getSignCheckContentV1(params);
                //AlipayConfig.logResult(sWord);
            }
        } catch (AlipayApiException e) {
            e.printStackTrace();
        }
    }

    @RequestMapping("success.html")
    public String success() {
        return "pay/success";
    }

    /**
     * 订单查询信息信息构建
     *
     * @param request
     * @return
     */
    public static String createQueryInfo(HttpServletRequest request){
        //商户订单号，商户网站订单系统中唯一订单号
        String out_trade_no = request.getParameter("WIDTQout_trade_no");
        //支付宝交易号
        String trade_no = request.getParameter("WIDTQtrade_no");
        //请二选一设置

        String a = "{\"out_trade_no\":\""+ out_trade_no +"\","+"\"trade_no\":\""+ trade_no +"\"}";

        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("{");
        stringBuilder.append("\"out_trade_no\":\"" + out_trade_no + "\",");
        stringBuilder.append("\"trade_no\":\"" + trade_no + "\"");
        stringBuilder.append("}");
        return stringBuilder.toString();
    }

    /**
     * 订单支付信息构建
     *
     * @param request
     * @return
     */
    public static String createPayInfo(HttpServletRequest request){
        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = request.getParameter("WIDout_trade_no");
        //付款金额，必填
        String total_amount = request.getParameter("WIDtotal_amount");
        //订单名称，必填
        String subject = request.getParameter("WIDsubject");
        //商品描述，可空
        String body = request.getParameter("WIDbody");

        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("{");
        stringBuilder.append("\"out_trade_no\":\"" + out_trade_no + "\",");
        stringBuilder.append("\"total_amount\":\"" + total_amount + "\",");
        stringBuilder.append("\"subject\":\"" + subject + "\",");
        stringBuilder.append("\"body\":\"" + body + "\",");
        stringBuilder.append("\"product_code\":\"FAST_INSTANT_TRADE_PAY\"");
        //手机支付参数
        //stringBuilder.append("\"product_code\":\"QUICK_WAP_PAY\"");
        stringBuilder.append("}");
        return stringBuilder.toString();
    }

    /**
     * 订单退款信息构建
     *
     * @param request
     * @return
     */
    public static String createRefundInfo(HttpServletRequest request){
        //商户订单号，商户网站订单系统中唯一订单号
        String out_trade_no = request.getParameter("WIDTRout_trade_no");
        //支付宝交易号
        String trade_no = request.getParameter("WIDTRtrade_no");
        //请二选一设置
        //需要退款的金额，该金额不能大于订单金额，必填
        String refund_amount = request.getParameter("WIDTRrefund_amount");
        //退款的原因说明
        String refund_reason = request.getParameter("WIDTRrefund_reason");
        //标识一次退款请求，同一笔交易多次退款需要保证唯一，如需部分退款，则此参数必传
        String out_request_no = request.getParameter("WIDTRout_request_no");

        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("{");
        stringBuilder.append("\"out_trade_no\":\"" + out_trade_no + "\",");
        stringBuilder.append("\"trade_no\":\"" + trade_no + "\",");
        stringBuilder.append("\"refund_amount\":\"" + refund_amount + "\",");
        stringBuilder.append("\"refund_reason\":\"" + refund_reason + "\",");
        stringBuilder.append("\"out_request_no\":\"out_request_no\"");
        stringBuilder.append("}");
        return stringBuilder.toString();
    }

    /**
     * 订单退款查询信息信息构建
     *
     * @param request
     * @return
     */
    public static String createRefundQueryInfo(HttpServletRequest request){

        //商户订单号，商户网站订单系统中唯一订单号
        String out_trade_no = request.getParameter("WIDRQout_trade_no");
        //支付宝交易号
        String trade_no = request.getParameter("WIDRQtrade_no");
        //请二选一设置
        //请求退款接口时，传入的退款请求号，如果在退款请求时未传入，则该值为创建交易时的外部交易号，必填
        String out_request_no = request.getParameter("WIDRQout_request_no");

        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("{");
        stringBuilder.append("\"out_trade_no\":\"" + out_trade_no + "\",");
        stringBuilder.append("\"trade_no\":\"" + trade_no + "\",");
        stringBuilder.append("\"out_request_no\":\"" + out_request_no + "\"");
        stringBuilder.append("}");
        return stringBuilder.toString();
    }
}
